234 PHYTOPHAGA. 



18. Leptinotarsa undecimlineata. 



Myocoryna ll-Uneata, Stal, Diagn. 1858, p. 316; Monogr. Chrys. Amer. p. 163 \ 



Eab. Mexico \ Misantla, Cerro de Plumas (Edge), Guanajuato (Euges, coll. Salle), 

 Orizaba, Vera Cruz, Oaxaca, Tuxtla, Cordova (SallS) ; British Honduras, river Sarstoon 

 (Blancaneaux) ; Guatemala, Cubilguitz, El Reposo, San Geronimo, Purula, Tamahu, 

 Duenas, Capetillo (Champion); Nicaragua, Chontales (Janson, Belt); Costa Rica 1 , 

 Volcan de Irazu (Bogers, Van Patten).— Colombia 1 ; Bolivia 1 . 



The entirely blackish-green underside, legs, and elytral epipleurse, which are constant 

 in the very numerous specimens which have been received principally from Mexico and 

 Guatemala, distinguish well the present species from L. 10-lineata. St&l gives Bogota 

 and Bolivia as localities inhabited by L. ll-lineata ; it is therefore more than probable 

 that it may be found as well in the State of Panama. Two curiously marked specimens 

 from Mexico, which I take to be varieties, have come under my notice. In these speci- 

 mens only the margins of the elytral bands are indicated by fine black lines, the inter- 

 mediate spaces being of the ground-colour, so that in fact each elytron shows eight fine 

 longitudinal lines. In other respects the specimens show but little difference from the 

 normal ones. 



19. Leptinotarsa defecta. (Tab. xiii. fig. 21.) 



Myocoryna defecta, Stal, Diagn. 1859, p. 317; Monogr. Chrys. Amer. p. 165 \ 



Hob. North America, Texas 1 .— C?) Mexico 1 (coll. Jacoby), Yucatan 1 (SallS). 



Specimens of this species have the general appearance, with respect to their coloration, 

 of immature examples of L. decemMneata in which the elytral stripes have been prevented 

 from becoming perfectly developed ; a closer examination proves, however, that the 

 species is no doubt a distinct one. Stal only describes the thorax as spotted and 

 exactly resembling in its markings that of L. decemMneata. The elytra, however, are 

 differently punctate-striate. In the last-named species the third stria (counting the 

 short sutural one as the first) joins the suture at some distance below the middle ; in 

 the present insect the corresponding stria continues to the apex. The elytral markings 

 will be better understood by reference to the figure. Stal gives Texas as one of the 

 localities inhabited by this species. I have only seen specimens from Mexico, and find 

 no reference to the species inhabiting North America in either Rogers's or Crotch's 

 monograph of North- American Phytophaga. 



20. Leptinotarsa melanothorax. (Tab. XIII. fig. 22.) 



Myocoryna melanothorax, Stal, Diagn. 1859, p. 317; Monogr. Chrys. Amer. p. 166 \ 

 Ea]). Mexico \ Toluca, Puebla (SallS), Guanajuato (Luges, coll. Salle). 



Easily distinguished from the preceding species by the entirely black head and 

 thorax ; the third and fourth elytral black stripes are sometimes united. 



